diff --git a/DemoPrograms/Demo_Desktop_Widget_CPU_Top_Processes.py b/DemoPrograms/Demo_Desktop_Widget_CPU_Top_Processes.py
index 9d6b5316..727d3e33 100644
--- a/DemoPrograms/Demo_Desktop_Widget_CPU_Top_Processes.py
+++ b/DemoPrograms/Demo_Desktop_Widget_CPU_Top_Processes.py
@@ -42,36 +42,48 @@ def main():
 
     # start cpu measurement thread
     # using the PySimpleGUI call to start and manage the thread
-    window.perform_long_operation(lambda: CPU_thread(window), '-THREAD FINISHED-')
+    window.start_thread(lambda: CPU_thread(window), '-THREAD FINISHED-')
     g_interval = 1
-    # ----------------  main loop  ----------------
-    while True:
-        # --------- Read and update window --------
-        event, values = window.read()
-        # print(event, values)
-        # --------- Do Button Operations --------
-        if event in (sg.WIN_CLOSE_ATTEMPTED_EVENT, 'Exit'):
-            sg.user_settings_set_entry('-location-', window.current_location())     # save window location before exiting
-            break
-        if event == 'Edit Me':
-            sp = sg.execute_editor(__file__)
-        elif event == 'Version':
-            sg.popup_scrolled(__file__, sg.get_versions(), keep_on_top=True, location=window.current_location())
-        elif event == '-CPU UPDATE FROM THREAD-':                   # indicates data from the thread has arrived
-            cpu_percent, procs = values[event]                      # the thread sends a tuple
-            if procs:
-                # --------- Create dictionary of top % CPU processes.  Format is name:cpu_percent --------
-                top = {proc.name(): proc.cpu_percent() for proc in procs}
+    # Unusual construct of a Try around entire event loop... something is crashing, we need to find out what...
+    try:
+       # ----------------  main loop  ----------------
+        while True:
+            # --------- Read and update window --------
+            event, values = window.read()
+            # print(event, values)
+            # --------- Do Button Operations --------
+            if event in (sg.WIN_CLOSE_ATTEMPTED_EVENT, 'Exit'):
+                sg.user_settings_set_entry('-location-', window.current_location())     # save window location before exiting
+                break
+            if event == 'Edit Me':
+                sp = sg.execute_editor(__file__)
+            elif event == 'Version':
+                sg.popup_scrolled(__file__, sg.get_versions(), keep_on_top=True, location=window.current_location())
+            elif event == '-CPU UPDATE FROM THREAD-':                   # indicates data from the thread has arrived
+                cpu_percent, procs = values[event]                      # the thread sends a tuple
+                if procs:
+                    # --------- Create dictionary of top % CPU processes.  Format is name:cpu_percent --------
+                    top = {}
+                    for proc in procs:
+                        try:
+                            top[proc.name()] = proc.cpu_percent()
+                        except Exception as e:
+                            pass    # it's OK to get an exception here because processes come and go... one may have gone...
+                            # sg.Print('*** GOT Exception looping through procs ***', c='white on red', font='_ 18')
+                            # sg.Print('Exception = ', e, 'procs=', procs, 'proc', proc)
 
-                top_sorted = sorted(top.items(), key=operator.itemgetter(1), reverse=True)  # reverse sort to get highest CPU usage on top
-                if top_sorted:
-                    top_sorted.pop(0)           # remove the idle process
-                display_string =  '\n'.join([f'{cpu/10:2.2f} {proc:23}' for proc, cpu in top_sorted])
-                # --------- Display timer and proceses in window --------
-                window['-CPU PERCENT-'].update(f'CPU {cpu_percent}')
-                window['-PROCESSES-'].update(display_string)
-        # get the timeout from the spinner
-        g_interval = int(values['-SPIN-'])
+                    top_sorted = sorted(top.items(), key=operator.itemgetter(1), reverse=True)  # reverse sort to get highest CPU usage on top
+                    if top_sorted:
+                        top_sorted.pop(0)           # remove the idle process
+                    display_string =  '\n'.join([f'{cpu/10:2.2f} {proc:23}' for proc, cpu in top_sorted])
+                    # --------- Display timer and proceses in window --------
+                    window['-CPU PERCENT-'].update(f'CPU {cpu_percent}')
+                    window['-PROCESSES-'].update(display_string)
+            # get the timeout from the spinner
+            g_interval = int(values['-SPIN-'])
+    except Exception as e:
+        sg.Print('*** GOT Exception in event loop ***', c='white on red', font='_ 18')
+        sg.Print('Exception = ', e, wait=True)      # IMPORTANT to add a wait/blocking so that the print pauses execution. Otherwise program continue and exits
 
     window.close()